100pcs Hex Socket Self Tapping Screws 1/4 x 1" Stainless Steel Flat Head Black H2*65mm Usable Size of Square Connector:

Usable Size of Square Connector: 19 x 19mm/0

Model: SHF16

Total Size: 24 x 21

the rotational speed should be slower than normal drilling

100pcs Hex Socket Self Tapping Screws 1/4 x 1" Stainless Steel Flat Head Black H2*65mm Usable Size of Square Connector:Made of 410 stainless steel, which has higher hardness, corrosion resistance and rust resistance. The self drilling screws can drill well into the wood, sheet metal and other surfaces. The thread can reduce the resistance when screwing in and prevent cracking. It can also connect metal hardware to the wood well because the threaded rods provide good retention in the wood. Widely used in various industries such as manufacturing, construction,